The literature suggests a survivorship of unicompartmental knee arthroplasties (UKA) for spontaneous osteonecrosisof the knee range from 93% to 96.7% at 10 to 12 years. However, these data arise from series reporting 23 to 33 patients, jeopardizing meaningful conclusions. Our purpose is to examine a long term survivorship of UKA's in a larger group of patients with SPONK, along with their subjective, symptomatic and functional outcome; to determine the percentage of failures and the reasons for the same in an attempt to identify relevant indications, contraindications, and technical parameters in treating SPONK with a modern implant design.INTRODUCTION
OBJECTIVES
The purpose of our work was to evaluate changes in clinical scores, passive knee kinematics and stability after mobile bearing TKA surgery. 60 patients were treated with a mobile bearing prosthesis (Gemini, Waldemar Link, Hamburg, Germany). PCL was always resected. Inclusion criteria were BMI >30, age range 60–80 yrs. Preoperative KSS, KOOS and SF36 scores were recorded. Surgeries were performed with a navigation system (BLU-IGS, Orthokey Italia, Firenze, Italy) to verify bone cuts, ligament balancing and implant positioning. Kinematic tests were executed to determine: tibial rotation and femoral translation through flexion range. Stability tests were performed using varus-valgus stress in extension and at 30° of flexion and drawer test. Acquisition were perfomed with menisci and cruciate ligaments intact, and repeated after final implant fixation. Clinical scores were recorded at 6 months follow-up.INTRODUCTION
MATERIAL AND METHODS
Conventional surgical exposures are usually inadequate for 2-stage revision knee replacement ofinfected implants. Reduced range of motion, extensor mechanism stiffness, peripatellar contracture and soft tissue scarring make patellar eversion difficult and forced eversion places the integrity of the extensor mechanism at risk. On the contrary, a wide exposure is fundamental to allow complete cement spacer removal, soft tissue balancing, management of bone loss and reimplantation without damaging periarticular soft tissues. To compare the long-term clinical, functional and radiographic results and the reinfection rate of the quadriceps snip approach and the tibial tubercle osteotomy in 2-stage revision knee replacement performed for septic loosening of the primary implant.INTRODUCTION
OBJECTIVES
